All Inu Yasha and Rurouni Kenshin. I think this animes' have the most outstanding compialtions of ending songs.
Personal favorites are:
Rurouni Kenshin - Tactics, Heart of Sword, 1/3 no Jonjou na Kanjou
GTO - Last Piece
Hungry Heart - Mi Title
Get Backers - Ichibyou no Refrain, Namida no Hurricane